An alternative route towards the fabrication of 2D blue phosphorene

Abstract Blue phosphorene (BlueP) is a novel two-dimensional material that shares properties with black and potentially even more interesting for opto-electronic applications because of its layer dependent wide band gap ≈ 2 to 3 eV superior charge carrier mobility. It was first fabricated on Au(111), where, however, network consisting BlueP subunits Au-linker atoms formed. The physical such an arrangement strongly differ from freestanding monolayer. Here, we report the growth epitaxial Au(100) surface, which alternative when aiming at quasi-freestanding domains. We find two different phosphorus phases by means scanning tunneling microscopy distortion-corrected low-energy electron diffraction. In low coverage regime, observe commensurate (2 × 2) phase, whereas higher coverage, nearly hexagonal structure For latter, lattice parameters measured via atomically resolved hydrogen closely resemble those BlueP, typical height modulation verified in our layers x-ray photoelectron further analyze chemical electronic these films (angle resolved) ultraviolet spectroscopy.